That notebook _____  John’s. It has his name on it. 

—The government should try to balance economic growth and pollution from industry.—____. It’s time to do it.

－Why are you looking so worried? Is there anything I can do for you?－The computer        break down when I nearly finished my composition.

--- ____I take the newspaper to the classroom? ---No, you mustn’t. You ______ read it only here.

There's only one day to go. You _____ finish your schoolwork by tomorrow.